When I have received this error in the past, it was because I didn't
have an IAM role properly defined for my EMR cluster.
Do you have "s3:*", included in your IAM role Actions for your EMR
cluster?
For example:
{
"Statement": [
{
"Action": [
"cloudwatch:*",
"ec2:Describe*",
"elasticmapreduce:Describe*",
"s3:*",
"sdb:*",
"sns:*",

Equal height columns is a famous problem in the CSS model, and
Bootstrap can do very little to help you.
The best you can do is read the broad amount of literature out there
(I recommend starting with
http://css-tricks.com/fluid-width-equal-height-columns/) and work out
which of the various hacks and limitations are the correct fit for
your purposes. This will differ based on the target browsers,

I am pretty sure that this could be achieved with carousel but I am
not sure if it is the best way.
Why not? Because of you already use Bootstrap you should use its
features in the first place.
also read http://getbootstrap.com/javascript/#carousel and find out
that you can use multiple carousels on the same page:
Carousels require the use of an id on the outermost container (the
.ca